DIY Add on diopter

Started 11 months ago | Discussions thread
Forum MemberPosts: 60
Re: DIY Add on diopter
In reply to Stephen Barrett, 11 months ago

Stephen Barrett wrote:

Hello dickiedoo,
You can get an approximate measure of the focal length of your closeup lens by focusing a distant scene (eg a tree outside the window) onto a wall and measuring the midpoint of the lens to the wall.

Can you explain that in a different way,I'm not following you


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